CN102339664B - Method for preparing high-field Nb3Sn superconducting strand with Nb47Ti bar to add Ti - Google Patents
Method for preparing high-field Nb3Sn superconducting strand with Nb47Ti bar to add Ti Download PDFInfo
- Publication number
- CN102339664B CN102339664B CN2011102472728A CN201110247272A CN102339664B CN 102339664 B CN102339664 B CN 102339664B CN 2011102472728 A CN2011102472728 A CN 2011102472728A CN 201110247272 A CN201110247272 A CN 201110247272A CN 102339664 B CN102339664 B CN 102339664B
- Authority
- CN
- China
- Prior art keywords
- nb47ti
- cunb
- jacket
- plug
- core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Landscapes
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
The invention relates to a method for preparing a high-field Nb3Sn superconducting strand with a Nb47Ti bar to add Ti, which adopts Nb47Ti as an adding source to replace a partial Nb core wire so that the purpose of adding Ti is achieved, realizes a key technology for adopting Nb47Ti as the adding source to add Ti in a high-field Nb3Sn strand production process, and can be applied to the preparation of the high-field Nb3Sn strand. The distribution method, the number, the follow-up processing method, the parameters and the like of Nb47Ti have been successfully applied to production tests, the Nb47Ti is uniformly and symmetrically distributed in the middle of the Nb core wire, so that the uniformity of Ti diffusion in heat treatment is benefited, and the generation and the reaction of Nb3Sn are fully participated in; a set of mature procedures including cleaning, assembly, degassing, welding, extrusion and drawing are used; and metallurgy integration among all component interfaces of a CuNb multi-core composite bar with the Nb47Ti core is realized, and the composite bar is used for preparing the Nb3Sn superconducting strand which can be applied to high-filed magnet preparation.
Description
Technical field
The present invention relates to a kind ofly add the Ti element with the Nb47Ti rod as the interpolation source and prepare High-Field Nb
3The method of Sn Superconducting Strand belongs to the superconductor preparing technical field, relates to a kind of at High-Field Nb
3Add the method for Ti element in the Sn strand manufacture process with the form of Nb47Ti rod.
Background technology
Nei Xifa Nb
3The Sn strand is mainly used in the high-tech sectors such as thermonuclear fusion reaction experimental reactor (ITER), NMR, high-energy physics, particle accelerator magnet, in order to improve the current capacity of strand under the High-Field, commercial Nb
3The Sn strand all needs to add element Ti or Ta, considers cost and adding method, and it is first-selected adding the Ti element.At interior tin method Nb
3In the Sn strand manufacture technique, independent of one another because of Cu, Nb, each constituent element of Sn, flexible design is so that the adding method of Ti element has diversity and flexibility.Through development in recent years, comparatively ripe Ti addition manner has two kinds: a kind of is Ti to be added on form the Sn-Ti alloy in the Sn source, and another kind is as constituent element replacement minority Nb core independently with the Nb47Ti core.The first method development early also sees both at home and abroad relevant paper and patent, but because the cost of manufacture of Sn-Ti alloy is higher, and the hard fragility of large-size Ti6Sn5 particle has also limited further developing of the method in the alloy.The adding method cost of Nb47Ti is low, and plasticity is fine, is Nb
3The Ti adding method that the Sn strand manufacture is comparatively desirable.The method still is in the initial application stage, and key technology is wherein grasped as business secret by more external superconductor production companies, and relevant paper and patent also only only limit to introduce.
Add the Ti element in the mode of Nb47Ti, the design of distribution mode has determined the uniformity of Ti diffusion in the strand heat treatment process, thereby has determined the additive effect of Ti element; And interpolation quantity has determined the adding proportion of Ti; To guarantee that in the course of processing deform in same pace of Nb47Ti core silk and Nb core silk is to guarantee the normal stretching of strand, so processing mode and machined parameters have determined that then the method success is applied to produce.
Summary of the invention
The technical problem that solves
For fear of the deficiencies in the prior art part, the present invention proposes a kind ofly to prepare High-Field Nb with the Nb47Ti rod as adding the Ti element
3The method of Sn Superconducting Strand.
Technical scheme
A kind ofly prepare High-Field Nb with the Nb47Ti rod as adding the Ti element
3The method of Sn Superconducting Strand is characterized in that step is as follows:
Step 1 adopts the single plug of CuNb to carry out the jacket assembling: be followed successively by from outside to inside: Cu jacket, Nb barrier layer, the single plug of CuNb and the single plug of Nb47Ti, pure Cu plug; Assembling process is at the single plug of the peripheral solid matter distribution of the pure Cu plug central core CuNb of solid matter, in the middle of the single plug of CuNb, distribute symmetrically and evenly the single plug of some Nb47Ti is set, put into together in the Cu jacket after putting again the Nb barrier layer, at last with the slit between fine copper interpolation slit rod reeve Nb barrier layer and the single plug of CuNb, build upper and lower covers, finish assembling; The shape of the single plug of described CuNb, the single plug of Nb47Ti and pure Cu plug is six sides;
The single plug of described Nb47Ti is identical with the single plug size shape of CuNb;
The single plug of described CuNb is 200～400;
The single plug of described Nb47Ti is 5～20;
The step 2 pair CuNb multicore jacket that assembles carries out degassing processing: carry out in vacuum heat treatment furnace, open the end cap of jacket one end, degasification vacuum degree is 10
-2Pa, the degasification temperature is 450 ℃, treats can come out of the stove when the jacket temperature is down to below 50 ℃, finishes the degasification operation;
Jacket after the step 3 pair degasification carries out soldering: carry out in vacuum electron beam welder, when vacuum degree to 5.0 * 10
-3Up and down end cap to jacket behind the Pa carries out electron beam soldering and sealing, and each constituent element is sealed in the Cu jacket; Behind jacket cooling 30min, take out, finish welding;
The jacket of step 4 pair welding pushes: carry out at horizontal extruder, before the extruding jacket fully is heated to 600 ℃, according to the speed extruding of 10～30mm/S, extrusion ratio is controlled at 10～20, obtains High-Field Nb again
3Sn Superconducting Strand preparation appliance has the CuNb multicore composite rod of Nb47Ti core;
The preparation of step 5 subgroup unit: the CuNb multicore composite rod with Nb47Ti that will obtain blocks and is single 1.2～1.5m, carry out deep hole machining at deep hole processing equipment and remove the CuNb multicore multiple tube that core Cu district obtains to have Nb47Ti, be contained in the CuNb-Sn multicore complex that obtains to have the Sn source in the multiple tube through the Sn group of alloys of cleaning, redraw the subgroup unit that this species complex of processing obtains to be used for assembling final blank;
The final blank processing of step 6: according to product requirement first being assembled in the Cu pipe with pure Cu plug boundling of the subgroup of some numbers obtained final blank, this final blank acquisition High-Field Nb of stretched processing
3The Sn Superconducting Strand.
Beneficial effect
The a kind of of the present invention's proposition prepares High-Field Nb with Nb47Ti as interpolation source interpolation Ti element
3The method of Sn Superconducting Strand is replaced part Nb core silk with Nb47Ti as the interpolation source and is reached the purpose that the Ti element adds, and has solved High-Field Nb
3Add the key technology of Ti element in the Sn strand production process with Nb47Ti as the interpolation source, can be applicable to High-Field Nb
3The preparation of Sn strand.The distribution mode of Nb47Ti among the present invention, quantity, follow-up processing method and parameter etc. have been successfully applied to pilot production, and Nb47Ti is distributed in the middle of the Nb core silk symmetrically, the uniformity of Ti Elements Diffusion when being beneficial to heat treatment, attend fully Nb
3The reaction of formation of Sn; Used ripe cleaning, assembling, degasification, welding, extruding, the drawing procedure of a cover, having between each constituent element interface of Nb47Ti core CuNb multicore composite rod of preparation reached metallurgical binding, uses this compound bar to prepare and can be applicable to the Nb that high field magnet prepares
3The Sn Superconducting Strand.
This method has been used business-like Nb47Ti rod, and cost is lower; And Nb47Ti has excellent cold working plasticity, is beneficial to very much Nb
3The cold drawn processing of Sn strand; This technique machinability is good, can be used for production and application.
Description of drawings
Fig. 1: for having 8 Nb47Ti cores, the design of the CuNb jacket of 334 Nb cores;
Fig. 2: for having 18 Nb47Ti cores, the CuNb jacket design of 324 Nb cores;
Fig. 3: for having 18 Nb47Ti cores, the CuNb rod extruding sectional view of 324 Nb cores;
Fig. 4: be the Nb with the preparation of Nb47Ti core CuNb rod that utilizes this invention to obtain
3The diffusion profile of Ti during the heat treatment of Sn strand.
The 1-Cu jacket, 2-Nb barrier layer, 3-CuNb plug district, the NbTi plug that 4-distributes symmetrically, 5-center C u plug district.
Embodiment
Now in conjunction with the embodiments, the invention will be further described for accompanying drawing:
Embodiment 1: design has 334 CuNb plugs, the High-Field Nb of 8 NbTi/Cu plugs
3Sn strand production multicore CuNb jacket, as shown in Figure 1.1 is the Cu jacket among the figure, and 2 is the Nb barrier layer, and 3 is the CuNb plug district of 334 solid matters, and 4 is 8 NbTi/Cu plugs that distribute symmetrically, and centered by 5 Cu plug district.
Step 1 adopts the single plug of CuNb to carry out the jacket assembling: the single plug of pure Cu plug district peripheral solid matter distribution CuNb at the center, in the middle of the single plug of CuNb, distribute symmetrically and evenly the Nb47Ti/Cu core is set, put into together in the Cu jacket after putting again the Nb barrier layer, at last with the slit between the single plug of fine copper interpolation slit rod reeve CuNb and the Nb barrier layer, build upper and lower covers, finish assembling; The shape of the single plug of described CuNb, Nb47Ti/Cu plug and pure Cu plug is six sides;
The step 2 pair CuNb multicore jacket that assembles carries out degassing processing: open the end cap of jacket one end, degasification vacuum degree is 10
-2Pa, the degasification temperature is 450 ℃, treats to come out of the stove when temperature is reduced to below 50 ℃, finishes the degasification operation;
Jacket after the step 3 pair degasification carries out soldering: carry out in vacuum electron beam welder, welding vacuum degree is 5.0 * 10
-3Pa carries out electron beam soldering and sealing to the up and down end cap of jacket, and each constituent element is sealed in the Cu jacket; Behind jacket cooling 30min, take out, finish welding;
The jacket of step 4 pair welding pushes: carry out at horizontal extruder, before the extruding jacket fully is heated to 600 ℃, extrusion speed is 20mm/S, and extrusion ratio is 10.15, obtains High-Field Nb
3Sn Superconducting Strand preparation appliance has the CuNb multicore composite rod of Nb47Ti core.
Each constituent element interface reaches metallurgical binding fully in the rear bar of extruding, and regular shape, conforms to design.
The preparation of step 5 subgroup unit: the CuNb multicore composite rod with Nb47Ti that will obtain blocks and is single 1.2m, carries out deep hole machining at deep hole processing equipment and removes core Cu district, obtains to have the CuNb multicore multiple tube of Nb47Ti core.The Sn group of alloys of cleaning is contained in the CuNb multicore multiple tube with Nb47Ti core that cleaned, obtains to have the CuNb-Sn multicore complex in Sn source, redraw the subgroup unit that this species complex of processing obtains to be used for assembling final blank.
Step 6 High-Field Nb
3The processing of Sn strand: 54 subgroup units and 7 pure Cu plug boundlings are assembled in the final blank of acquisition in the Cu pipe, and this final blank of stretched processing obtains High-Field Nb
3The Sn Superconducting Strand.
Embodiment 2:
Change the NbTi/Cu plug quantity among the embodiment 1 into 18, CuNb plug quantity is 324 simultaneously, assembling, degasification, welding, extruding, the same embodiment of strand manufacturing procedure, and the oversensitive compound bar sectional view of the CuNb with NbTi core silk that obtains is as shown in Figure 3.1 is the Cu jacket among the figure, and 2 is the Nb barrier layer, and 3 is the CuNb plug district of 324 solid matters, and 4 is 18 NbTi/Cu plugs that distribute symmetrically, and centered by 5 Cu plug district.As seen from the figure, the shape of each constituent element in the cross section, arranging conforms to design drawing 2, and Cu and Nb barrier layer, and the Cu between the Cu between the CuNb plug and NbTi/Cu plug is without lamination, and reaches metallurgical binding.
The Nb with Nb47Ti core CuNb rod preparation of figure four for utilizing this invention to obtain
3The diffusion profile of Ti during the heat treatment of Sn strand, visible Ti has been uniformly distributed in the interface of strand, has reached good additive effect.
Claims (1)
1. one kind prepares High-Field Nb with the Nb47Ti rod as adding the Ti element
3The method of Sn Superconducting Strand is characterized in that step is as follows:
Step 1 adopts the single plug of CuNb to carry out the jacket assembling: be followed successively by from outside to inside: Cu jacket, Nb barrier layer, the single plug of CuNb and the single plug of Nb47Ti, pure Cu plug; Assembling process is at the single plug of the peripheral solid matter distribution of the pure Cu plug central core CuNb of solid matter, in the middle of the single plug of CuNb, distribute symmetrically and evenly the single plug of some Nb47Ti is set, put into together in the Cu jacket after putting again the Nb barrier layer, at last with the slit between fine copper interpolation slit rod reeve Nb barrier layer and the single plug of CuNb, build upper and lower covers, finish assembling; The shape of the single plug of described CuNb, the single plug of Nb47Ti and pure Cu plug is six sides;
The step 2 pair CuNb multicore jacket that assembles carries out degassing processing: carry out in vacuum heat treatment furnace, open the end cap of jacket one end, degasification vacuum degree is 10
-2Pa, the degasification temperature is 450 ℃, treats to come out of the stove when the jacket temperature is down to below 50 ℃, finishes the degasification operation;
Jacket after the step 3 pair degasification carries out soldering: carry out in vacuum electron beam welder, when vacuum degree to 5.0 * 10
-3Up and down end cap to jacket behind the Pa carries out electron beam soldering and sealing, and each constituent element is sealed in the Cu jacket; Behind jacket cooling 30min, take out, finish welding;
The jacket of step 4 pair welding pushes: carry out at horizontal extruder, before the extruding jacket fully is heated to 600 ℃, according to the speed extruding of 10～30mm/S, extrusion ratio is controlled at 10～20, obtains the CuNb multicore composite rod that High-Field Nb3Sn Superconducting Strand preparation appliance has the Nb47Ti core again;
The preparation of step 5 subgroup unit: the CuNb multicore composite rod with Nb47Ti core that will obtain blocks and is single 1.2～1.5m, carry out deep hole machining at deep hole processing equipment and remove the CuNb multicore multiple tube that core Cu district obtains to have the Nb47Ti core, be contained in the CuNb-Sn multicore complex that obtains to have the Sn source in the multiple tube through the Sn group of alloys of cleaning, redraw the subgroup unit that this species complex of processing obtains to be used for assembling final blank;
The final blank processing of step 6: according to product requirement first being assembled in the Cu pipe with pure Cu plug boundling of the subgroup of some numbers obtained final blank, this final blank acquisition High-Field Nb of stretched processing
3The Sn Superconducting Strand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102472728A CN102339664B (en) | 2011-08-25 | 2011-08-25 | Method for preparing high-field Nb3Sn superconducting strand with Nb47Ti bar to add Ti |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102472728A CN102339664B (en) | 2011-08-25 | 2011-08-25 | Method for preparing high-field Nb3Sn superconducting strand with Nb47Ti bar to add Ti |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102339664A CN102339664A (en) | 2012-02-01 |
| CN102339664B true CN102339664B (en) | 2013-01-02 |
Family
ID=45515336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102472728A Active CN102339664B (en) | 2011-08-25 | 2011-08-25 | Method for preparing high-field Nb3Sn superconducting strand with Nb47Ti bar to add Ti |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102339664B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103056506B (en) * | 2012-12-03 | 2015-04-08 | 西部超导材料科技股份有限公司 | Vacuum electron beam welding method of NbTi/Cu superconduction composite sheath |
| CN103894795B (en) * | 2014-03-24 | 2016-03-16 | 西部超导材料科技股份有限公司 | The method of one species complex jacket degasification exhaust tube hydraulic tongs envelope |
| KR102587809B1 (en) * | 2015-07-14 | 2023-10-10 | 에이치. 씨. 스타아크 아이앤씨 | Fabrication of enhanced superconducting wires |
| CN105513712B (en) * | 2015-11-25 | 2017-03-22 | 西部超导材料科技股份有限公司 | Preparation method of high-critical-current-density Nb3Sn superconductive wire rod |
| US10573435B2 (en) * | 2016-01-29 | 2020-02-25 | Bruker Ost Llc | Method for producing a multifilament Nb3Sn superconducting wire |
| CN107170526B (en) * | 2017-04-28 | 2020-03-27 | 西部超导材料科技股份有限公司 | Preparation method of copper-niobium composite rod for high critical current density niobium-tin superconducting wire |
| CN110556213A (en) * | 2018-06-04 | 2019-12-10 | 西部超导材料科技股份有限公司 | Preparation method of composite rod for improving superconducting composite linear performance of Nb 3 Sn |
| CN110580985A (en) * | 2018-06-11 | 2019-12-17 | 西部超导材料科技股份有限公司 | Method for preparing high critical current niobium-tin superconducting strand in external blocking mode |
| CN110993185B (en) * | 2019-12-23 | 2021-03-09 | 福建师范大学 | Ti-doped internal tin method Nb3Preparation method of Sn precursor wire |
| CN115295243B (en) * | 2022-09-30 | 2022-12-30 | 西部超导材料科技股份有限公司 | Preparation method of element-doped high-critical-current-density niobium-tin superconducting strand |
| CN115295242B (en) * | 2022-09-30 | 2023-01-24 | 西部超导材料科技股份有限公司 | Preparation method of niobium tri-tin superconducting stranded wire with high critical current density |
| CN117476286B (en) * | 2023-12-27 | 2024-04-02 | 西安聚能超导线材科技有限公司 | Preparation method of NbTi superconducting wire with high critical current density |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85107979A (en) * | 1985-10-18 | 1987-04-22 | 中国科学院上海冶金研究所 | The method for preparing Nb 3 Sn high field super-conduct composite line |
| CN1508813A (en) * | 2002-10-23 | 2004-06-30 | EMS-ŷ�ްͽ���������ɷݹ�˾ | Cold synthesizing method for obtaining bar-like semifinished product frow which to produce high-performance super conducting cables |
| CN101110287A (en) * | 2007-09-05 | 2008-01-23 | 西北有色金属研究院 | Preparing technique of NbTiTa/Cu superconducting wire |
| CN101728029A (en) * | 2009-12-22 | 2010-06-09 | 西北有色金属研究院 | Preparation method for NbTi/Cu multi-core composite superconducting wire with rectangular section |
-
2011
- 2011-08-25 CN CN2011102472728A patent/CN102339664B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85107979A (en) * | 1985-10-18 | 1987-04-22 | 中国科学院上海冶金研究所 | The method for preparing Nb 3 Sn high field super-conduct composite line |
| CN1508813A (en) * | 2002-10-23 | 2004-06-30 | EMS-ŷ�ްͽ���������ɷݹ�˾ | Cold synthesizing method for obtaining bar-like semifinished product frow which to produce high-performance super conducting cables |
| CN101110287A (en) * | 2007-09-05 | 2008-01-23 | 西北有色金属研究院 | Preparing technique of NbTiTa/Cu superconducting wire |
| CN101728029A (en) * | 2009-12-22 | 2010-06-09 | 西北有色金属研究院 | Preparation method for NbTi/Cu multi-core composite superconducting wire with rectangular section |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102339664A (en) | 2012-02-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102339664B (en) | Method for preparing high-field Nb3Sn superconducting strand with Nb47Ti bar to add Ti | |
| CN101707084B (en) | Manufacturing method for copper-magnesium alloy stranded wire | |
| CN101859612B (en) | Preparation method of CuNb composite pipe for high-field Nb3Sn wire material | |
| CN101714429B (en) | Preparation method for Bi-2212 high-temperature superconducting wires | |
| CN110391048B (en) | Nb-shaped alloy3Preparation method of Sn precursor wire | |
| CN105513712B (en) | Preparation method of high-critical-current-density Nb3Sn superconductive wire rod | |
| CN104091651A (en) | Method for manufacturing multi-core MgB2 superconductive wires through extrusion technology | |
| CN114694894B (en) | Short-range diffusion type Nb 3 Preparation method of Sn superconducting wire | |
| CN104123998B (en) | Nei Xifa Nb3Preparation methoies of the Sn with multicore CuNb compound bars | |
| CN103606423B (en) | A kind of MgB 2the preparation method of-NbTi composite superconducting wire | |
| CN102354579B (en) | Preparation method of NbTi/Cu superconducting wire used for magnetic resonance imaging (MRI) | |
| CN110556213A (en) | Preparation method of composite rod for improving superconducting composite linear performance of Nb 3 Sn | |
| CN107346683B (en) | A kind of high critical current densities Nb3The preparation method of Sn superconducting wire CuNb compound bar | |
| CN102298995B (en) | Method for processing Ta blocking layer tube component in preparation of Nb3Sn superconducting wire through internal tin method | |
| CN103556016A (en) | Moderate-intensity high-conductivity electrical aluminum wire material and preparation method thereof | |
| CN104032245B (en) | A kind of Ultra-fine Grained high-performance CuCrNiSi alloy slot wedge preparation technology | |
| CN102082009B (en) | Process for preparing bronze Nb3Sn superconducting wire material | |
| CN201477910U (en) | Tinned copper-clad copper metal compound wire | |
| CN110444336B (en) | Preparation of MgB by adopting pulse current2Method for manufacturing multi-core superconducting wire | |
| CN102723144A (en) | Method for preparing Cu-Ag multi-core composite wire | |
| CN103774206A (en) | Preparation process of metal fiber | |
| CN103173705A (en) | Method for optimizing oxygen content in Bi-2223 phase of superconductive tape and superconductive lead produced by same | |
| CN103093899B (en) | Nb 3the preparation method of Al superconducting wire split conductor presoma | |
| CN104889193A (en) | Cu-Nb composite wire comprehensive performance improvement preparation method | |
| CN103871683A (en) | Preparation method of superconducting wires |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: WESTERN SUPERCOMDUCING TECHNOLOGIES CO., LTD. Free format text: FORMER NAME: WESTERN SUPERCONDUCTING TECHNOLOGIES CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 710000 No. 12 Mingguang Road, Xi'an economic and Technological Development Zone, Shaanxi, Xi'an Patentee after: Western Superconducting Technologies Co., Ltd. Address before: 710000 No. 12 Mingguang Road, Xi'an economic and Technological Development Zone, Shaanxi, Xi'an Patentee before: Western Superconducting Technologies Co., Ltd. |